Nexuia

Hi I currently own a 02 GT but my engine just went bad and I will have to replace it (sadly I bought a lemon) I found a guy selling an 01 cobra engine with the transmission for 3000 but the thing that concerns me is the mileage is only 29K and he did post photos of the odometer and it matches what he said but I was wondering I would have to replace anything like seals or something since it hasn't been driven much?